Salaah

Q: Is Salaah valid if a man reads in a tight fitting outfit?

Q: If we perform a fardh salaah which have sunnah muakkadah after it (zuhr, magrib, isha), when should we read dua after salaah? After the fardh salaah or after the sunnah muakkadah salaah, or after both?

Q: Please help answer this based on the Shafi'ee mazhab. If a musalli joins the congregrational prayer and he joins when the Imam is in ruku, will he still get one rakaat, how about al fatihah that he did not read for this rakaat?

Q: If one has a doubt if he missed a waajib or fardh act what should he do?

Q: If one intends to break his salaah does it break just by intention?

Q: How long is it waajib for jalsah in salaah?

Q: In s​alaah after ruku while standing when one is reading rabana walakal hamd. Is salaah valid if most of rabana walakal hamd was read standing and maybe a little while moving down? If not and one just bent his knees a bit and moved his hands forward, then is it valid? 

Q:

1. If when following the Imaam, the Imaam says allahu akbar to go to sajdah and you say it only when he says it but finished before he did. Is the salaah accepted? An is this for all takbeer and salaam? 
2. If you proceed for sajdah only after the Imaam or same time but you are there before he is. Is the salaah valid?

Q: What is the status of taraaweeh salaah that is performed in the month of Ramadhaan?

Q: When I came late for salaah and had to complete missed rakaats I read durood-e-ibrahim and dua. Does this make sajdah sawhu waajib? If yes and previously I should do this out of ignorance and cannot not remember how many times are done it what should I do?